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maxonik [38]
3 years ago
10

1. Calculate the molar mass of the substances involved in the reaction

Chemistry
1 answer:
Nookie1986 [14]3 years ago
3 0

The molar mass of a substance/chemical is the mass of the sample substance divided by the  amount of substance in that sample.

Explanation:

  • In order to calculate the atomic mass of a substance we first obtain the atomic weight of the substance from the periodic table.
  • Then we count the number of atoms of the substance and multiply it with the individual atomic mass.

Molar mass of Citric Acid ( H3C6H5O7) is 192.1235 g/mol

It is calculated as :

Molar mass of C₆H₈O₇ = 6(atomic mass of C) + 8(atomic mass of H) + 7(atomic mass of O) = 6(12.0 g/mol) + 8(1.0 g/mol) + 7(16.0 g/mol) = 192.0 g/mol.

Molar mass of baking soda (NaHCO₃) is 84.0 g/mol

Molar mass of NaHCO₃ = (atomic mass of Na) + (atomic mass of H) + (atomic mass of C) + 3(atomic mass of O) = (23.0 g/mol) + (1.0 g/mol) + (12.0 g/mol) + 3(16.0 g/mol) = 84.0 g/mol.

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How many molecules are in 165 g of carbon dioxide?
Alexeev081 [22]
First you need to know how many moles you would get from 165 g of carbon dioxide.
Carbon = 12
Oxygen 2 = 16 x 2 = 32
Total: 32 + 12 = 44
- Use proportions
1 mol CO2 x 1 mol CO2 44 g
---------------- = ---------- or ----------------- = ----------
44 g 165 x 165 g

165/44 = 3.75 moles CO2
- Last step is to multiply the amount of moles by Avagadros number, 6.02 x 10^23
3.75 x 6.02 x 10^23 = 2.25 x 10^24 molecules

- Keep in mind if your answer can be a little different than mind if you either round or keep the same numbers. I hope this Really Helps ! c:
7 0
3 years ago
Read 2 more answers
A strong acid with a concentration of 0.01 Mol/L would have a pH of __________.
BARSIC [14]

Answer:

2

Explanation:

the pH of the strong acid solution will be

pH = -log[H+] = -log[0.01] =  2

5 0
3 years ago
Which of the following ions would represent the ion of an element from Group 2A?
Gennadij [26K]

Answer:

D. A²⁺

Explanation:

Element from Group 2A -

The element of group 2A are known as the alkaline earth metals ,

The elements of this group are - beryllium (Be) , magnesium (Mg) , calcium (Ca) , strontium (Sr) , barium (Ba) , and radium (Ra).

The valence shell of these elements have two valence electrons and therefore , if the element need to stabilizes itself , it need to lose these two electrons and attain noble gas configuration,

Therefore ,

After losing the two electrons , the element becomes A²⁺.

Hence , the ions are symbolized as A²⁺.

3 0
3 years ago
A nut cracker is second lever. Give reason.​
muminat

Answer:

the load is between the fulcrum and the handle

Explanation:

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Hunter-Best [27]
Answer:

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Explanation:

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